/*
 * File    : PRUDPPacketReplyConnect.java
 * Created : 20-Jan-2004
 * By      : parg
 * 
 * Azureus - a Java Bittorrent client
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details ( see the LICENSE file ).
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package com.aelitis.azureus.core.dht.transport.udp.impl;

/**
 * @author parg
 *
 */

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.InetSocketAddress;

import com.aelitis.azureus.core.dht.DHT;
import com.aelitis.azureus.core.dht.transport.DHTTransportContact;
import com.aelitis.azureus.core.dht.transport.DHTTransportException;
import com.aelitis.azureus.core.dht.transport.DHTTransportValue;
import com.aelitis.azureus.core.dht.transport.udp.DHTTransportUDP;
import com.aelitis.azureus.core.dht.transport.udp.impl.packethandler.DHTUDPPacketNetworkHandler;

public class DHTUDPPacketReplyFindValue extends DHTUDPPacketReply {
    public static final int DHT_FIND_VALUE_HEADER_SIZE = DHTUDPPacketReply.DHT_HEADER_SIZE + 1 + 1 + 2;

    public static final int DHT_FIND_VALUE_TV_HEADER_SIZE = DHTUDPUtils.DHTTRANSPORTVALUE_SIZE_WITHOUT_VALUE;

    private DHTTransportContact[] contacts;
    private DHTTransportValue[] values;

    private boolean has_continuation;
    private byte diversification_type = DHT.DT_NONE;

    public DHTUDPPacketReplyFindValue(DHTTransportUDPImpl transport, int trans_id, long conn_id, DHTTransportContact local_contact,
            DHTTransportContact remote_contact) {
        super(transport, DHTUDPPacketHelper.ACT_REPLY_FIND_VALUE, trans_id, conn_id, local_contact, remote_contact);
    }

    protected DHTUDPPacketReplyFindValue(DHTUDPPacketNetworkHandler network_handler, InetSocketAddress originator, DataInputStream is, int trans_id)

    throws IOException {
        super(network_handler, originator, is, DHTUDPPacketHelper.ACT_REPLY_FIND_VALUE, trans_id);

        if (getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_DIV_AND_CONT) {

            has_continuation = is.readBoolean();
        }

        boolean is_value = is.readBoolean();

        if (is_value) {

            if (getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_DIV_AND_CONT) {

                diversification_type = is.readByte();
            }

            values = DHTUDPUtils.deserialiseTransportValues(this, is, 0);

        } else {

            contacts = DHTUDPUtils.deserialiseContacts(getTransport(), is);

            if (getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_VIVALDI_FINDVALUE) {

                DHTUDPUtils.deserialiseVivaldi(this, is);
            }
        }
    }

    public void serialise(DataOutputStream os)

    throws IOException {
        super.serialise(os);

        if (getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_DIV_AND_CONT) {

            os.writeBoolean(has_continuation);
        }

        os.writeBoolean(values != null);

        if (values == null) {

            DHTUDPUtils.serialiseContacts(os, contacts);

            if (getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_VIVALDI_FINDVALUE) {

                DHTUDPUtils.serialiseVivaldi(this, os);
            }
        } else {

            if (getProtocolVersion() >= DHTTransportUDP.PROTOCOL_VERSION_DIV_AND_CONT) {

                os.writeByte(diversification_type);
            }

            // values returned to a caller are adjusted by - skew

            try {
                DHTUDPUtils.serialiseTransportValues(this, os, values, -getClockSkew());

            } catch (DHTTransportException e) {

                throw (new IOException(e.getMessage()));
            }
        }
    }

    public boolean hasContinuation() {
        return (has_continuation);
    }

    protected void setValues(DHTTransportValue[] _values, byte _diversification_type, boolean _has_continuation) {
        has_continuation = _has_continuation;
        diversification_type = _diversification_type;
        values = _values;
    }

    protected DHTTransportValue[] getValues() {
        return (values);
    }

    protected byte getDiversificationType() {
        return (diversification_type);
    }

    protected void setContacts(DHTTransportContact[] _contacts) {
        contacts = _contacts;
    }

    protected DHTTransportContact[] getContacts() {
        return (contacts);
    }

    public String getString() {
        return (super.getString() + ",contacts=" + (contacts == null ? "null" : ("" + contacts.length)));
    }
}
